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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 19, 2004. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 713 | S10 | E56 | 04 | 0100 | Beta | Dec 24, 2004 | Dec 31, 2004 | Jan 14, 2005 |
| № 712 | S10 | E34 | 05 | 0030 | Beta | Dec 23, 2004 | Dec 30, 2004 | Jan 12, 2005 |
| № 710 | S07 | W85 | 01 | 0010 | Alpha | Dec 14, 2004 | Dec 21, 2004 | Jan 3, 2005 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to December 2004. The gray background is the average SSN index.
